Aims. Although S0 galaxies are usually thought to be “red and dead”, they often demonstrate star formation that is organized in ring structures. We try to clarify the nature of this phenomenon and ...its difference from star formation in spiral galaxies. Two early-type galaxies with outer rings, NGC 6534 and MCG 11-22-015, were selected to be studied. Methods. After inspecting the gas excitation in the rings using the Baldwin–Phillips–Terlevich method, we estimated the star formation rates (SFR) in the two outer rings of our galaxies using several SFR indicators derived from narrow-band photometry in the Hα emission line and archival GALEX ultraviolet images of the galaxies. Results. The ionized gas is excited by young stars in the ring of NGC 6534 and partly by shocks in MCG 11-22-015. The oxygen abundances in the HII regions of the rings are close to solar. The derived SFRs allow us to qualitatively restore star formation histories (SFH) in the rings: in NGC 6534, the SFH has been flat during the last 100–200 Myr, and in MCG 11-22-015, the star formation has started only a few Myr ago. We suggest that the rings in NGC 6534 and MCG 11-22-015 have different natures: the former is a resonant ring supplied with gas perhaps through tidal effects, and the latter has been produced by a satellite accretion. Recent outer gas accretion is implied in both cases.
The star formation rates SFR, as well as the SFR surface densities Σ
SFR
and absolute stellar magnitudes M
AB
, are determined and corrected for interinsic dust absorption for 34 disk galaxies of ...early morphological types with an outer ring structure and ultraviolet emission from the ring. These characteristic are determined for the outer ring structures and for the galaxies as a whole. Data from the space telescopes GALEX (in the NUV and FUV ultraviolet ranges) and WISE (in the W4 22 μm infrared band) are used. The average relative deviation in the corrected SFR and Σ
SFR
derived from the NUV and FUV bands is only 19.0%, so their averaged values are used for statistical consideration. The relations between the dust-corrected SFR characteristics, UV colours, the galaxy morphological type, absolute magnitude are illustrated.
Nowadays, medical institutions pay great attention to optimizing the medicine provision of inpatients. A significant range of medicines, which are registered in Ukraine and are used for the treatment ...of bronchial asthma (BA) in children, require improving the system of their selection for a particular department in conditions of optimal use of limited funds. Aim. The aim of the work is to assess the expense rationality of BA pharmacotherapy in children by the results of ABC/VEN-analysis. Materials and methods. Retrospective analysis of historical data of medical records in patients with the main diagnosis of BA, ABC/VEN-analysis. Results. For the economic evaluation of the rational medicine usage, an ABC-analysis was performed, which made it possible to rank medical prescriptions by level of consumption. Group A (80 % of costs) was formed by 14 international non-proprietary names (INN) (11.2 % of the total INN number), Group B (15 % of costs) – 25 INN (25.2 %), and Group C (5 % of the cost) – 61 INN (63.6 %). Formal VEN-analysis revealed the ratio of indices for INN, trade names and the number of medical prescriptions, which were 3:27:41; 11:74:102 and 411:768:618 respectively. It was established that during 2018 the largest part of group A expenditure was occupied by the segment of essential medicine (54.7 %), and vital – only 17.9 %, which indicates the need to further optimize the drug supply for children with asthma. Conclusions. The results of the conducted research demonstrate the need to improve the medicine provision of children with asthma, and can be used to make management decisions, purchase medicine by healthcare institutions and reduce the cost of pharmacotherapy by increasing the share of domestic medicine.
Aims.
Although S0 galaxies are usually thought to be “red and dead”, they often demonstrate star formation that is organized in ring structures. We try to clarify the nature of this phenomenon and ...its difference from star formation in spiral galaxies. Two early-type galaxies with outer rings, NGC 6534 and MCG 11-22-015, were selected to be studied.
Methods.
After inspecting the gas excitation in the rings using the Baldwin–Phillips–Terlevich method, we estimated the star formation rates (SFR) in the two outer rings of our galaxies using several SFR indicators derived from narrow-band photometry in the H
α
emission line and archival GALEX ultraviolet images of the galaxies.
Results.
The ionized gas is excited by young stars in the ring of NGC 6534 and partly by shocks in MCG 11-22-015. The oxygen abundances in the HII regions of the rings are close to solar. The derived SFRs allow us to qualitatively restore star formation histories (SFH) in the rings: in NGC 6534, the SFH has been flat during the last 100–200 Myr, and in MCG 11-22-015, the star formation has started only a few Myr ago. We suggest that the rings in NGC 6534 and MCG 11-22-015 have different natures: the former is a resonant ring supplied with gas perhaps through tidal effects, and the latter has been produced by a satellite accretion. Recent outer gas accretion is implied in both cases.
PDF
